I think the real truth is about 20% of the guys in the league can't play, 20% are marginal players, 40% are average and 20% are above average.
For the Sixers,
Korver is a role player, but IMO he could be successful anywhere as a result of his skill set. Who doesn't need a player who can shoot trey's at 40%? He's trying to develop a step-in and shoot off of that, and he works hard so he's a solid role player, or will be.
Dalembert is one of those guys that's in the middle 40% now. He looks like he could be in that top 20%, but he's not quite there. Some nights, he plays great, but other nights he just collects fouls. Having a teamate like Webber will really help Sam's progress, IMO.
Willie Green and John Salmons are in there with Rodney Rogers, Marc Jackson, Kevin Ollie and Aaron McKie as in that 40% group. It's too early yet to know how far Willie and John can go, bit the rest of them are what they are, decent role players.
That leaves Iverson and Webber still in that top 20%, and Igoudala a prospect, but not there yet, either.
The other players on the roster are probably in the bottom 20%. Maybe those young players they got from Sacramento can play, but we'll have to wait a while to see....
I don't know about all the other teams, but I'm sure evey guy here could pick the ones who are players out of nearly every lineup. You know the deal, most teams only use an 8 or 9 man rotation anyway. The other 3 hardly ever get in, only in blow-outs, one way or the other.
On the good teams the difference is how deep their benches are. Teams that don't have a drop-off with the second unit are the ones that usually come out on top.